TY - JOUR

T1 - Layout Study for the Dipole Magnets of the Future Circular Collider Using Nb-Ti and Nb3Sn

AU - Van Nugteren, J.

AU - Schoerling, Daniel

AU - Kirby, G.

AU - Murtomaki, J.

AU - de Rijk, G.

AU - Rossi, L.

AU - Bottura, L.

AU - Ten Kate, H.

AU - Dhalle, M.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - With the Large Hadron Collider (LHC) up and running, studies have started for its successor. Under study is the Future Circular Collider (FCC), which has a circumference of about 100 km, aiming at a proton-proton collision energy of 100 TeV. Consequently, the main bending dipole magnets have to operate at a magnetic field of 16 T. As a first step towards its realization, this paper presents the results of a parametric study of the cross-sectional layout for dipole magnets with a field in the range of 13-17 T using Nb-Ti and Nb3Sn superconductors. The principal layouts included are the classical Cosine-Theta, the Canted Cosine-Theta, and the Block type. Conductor cost can be reduced significantly when a graded hybrid solution is chosen. Optimizing such complex magnet layouts requires an iterative algorithm, which arranges the positions of the various blocks of coil windings in the coil cross section, thereby finding the thickness of the coil layers. The iterative algorithm is coupled to an adiabatic quench model, which finds an optimal copper-to-superconductor fraction for each of the layers. Outside the iterative cycle, a pattern search algorithm is applied to find a cost optimal distribution of the magnetic field generated by each coil layer.

AB - With the Large Hadron Collider (LHC) up and running, studies have started for its successor. Under study is the Future Circular Collider (FCC), which has a circumference of about 100 km, aiming at a proton-proton collision energy of 100 TeV. Consequently, the main bending dipole magnets have to operate at a magnetic field of 16 T. As a first step towards its realization, this paper presents the results of a parametric study of the cross-sectional layout for dipole magnets with a field in the range of 13-17 T using Nb-Ti and Nb3Sn superconductors. The principal layouts included are the classical Cosine-Theta, the Canted Cosine-Theta, and the Block type. Conductor cost can be reduced significantly when a graded hybrid solution is chosen. Optimizing such complex magnet layouts requires an iterative algorithm, which arranges the positions of the various blocks of coil windings in the coil cross section, thereby finding the thickness of the coil layers. The iterative algorithm is coupled to an adiabatic quench model, which finds an optimal copper-to-superconductor fraction for each of the layers. Outside the iterative cycle, a pattern search algorithm is applied to find a cost optimal distribution of the magnetic field generated by each coil layer.

KW - Accelerator Magnet

KW - Future Circular Collider

KW - Grading

KW - High Magnetic Field

KW - Low Temperature Superconductor

KW - Niobium-Titanium

KW - Optimization

KW - tri-Niobium Tin

UR - http://www.scopus.com/inward/record.url?scp=84963823748&partnerID=8YFLogxK

U2 - 10.1109/TASC.2016.2530042

DO - 10.1109/TASC.2016.2530042

M3 - Article

AN - SCOPUS:84963823748

VL - 26

JO - IEEE transactions on applied superconductivity

JF - IEEE transactions on applied superconductivity

SN - 1051-8223

IS - 4

M1 - 4003206

ER -